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I. LATTIMJERT KNOB ATTACHMENT. No. 271,479. Patented Jan. 30,1883.

INVENTOR:

BY .LMM

ATTORNEYS.

UNITED STATES P TENT Cerise.

FRANCIS LATTIMER, CF RICHMOND, NOVA SCOTIA, CANADA, ASSIGNOR OF TEN TWENTY-FOURTHS TO JOHN AHERN, OF SAME PLACE, AND VVIL- LIAM H. BATES, ALEXANDER CARTER, ARTHUR SMITH, \VILLIAM F. LINTON, WILLIAM MGCULLY, SEYMOUR E. GOURLEY, AND LYMAN J. WALKER, ALL OF TRURO, CANADA.

KNOB ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 271,479, dated January 30, 1888. Application filed May 18,1882. (Modeh) To all whom it may concern:

Be it known that I. FRANCIS LAT'LIMER, of Richmond, Halifax, Province of Nova Scotia, Dominion ofCanada have invented a new and useful Improvement in Knob-Spindle Fastenings for Mortise-Locks, of which the following is a full, clear, and exact description.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which similar letters of reference indicate corresponding parts in both figures.

Figure l is a front elevation of my improvement, shown'as applied to a door, and partly in s !ction,and Fig.2 isaside elevation ofthe same, partly in section through the line w 00, Fig. l.

The obect of this invention is to facilitate the attachment of knobs to the spindles of mortise-locks and promote security in such fastenings.

Theinvention consists in the combination, with the lock and the knob-spindle, of knobs havingextended shanksprovided withannular grooves at their ends and plates slotted to engage with the. said grooved shanks, whereby the knobs are securely fastened in place; also, in the combination, with the slotted plates and the lock having narrow face-plate, of a wider second face-plate, whereby the outer ends of the said slotted plates are covered and the said slotted plates are secured in place; and, also, in the knobs made with extended shanks, having annular grooves around their ends to adapt the knobs to be secured in place by slotted plates, as will be hereinafter fully described. I r

A represents-a door mortised to receive a lock, B. The knob-spindle Cis connected with the mechanism of the lock B in the ordinary manner, and need only project far enough to receive the extended shanks D of the knobs E. The extended shanks D of the knobs E pass through the side parts of the door A and rest against the sides of the lock B.

Around the inner ends of the knob-shank D are formed grooves F to receive the slotted, inner ends of the plates G, which are slipped into the mortise in the door A along the sides of the lock B. The outer ends of the slots in the platesG are flared, so that the said plates may be readily pushed into place.

The plates G, along the edges of the outer parts oftheir slots, are beveled, so that the said plates may readily pass into the grooves in the extended shanks D of the knobs E. For the same reason the edge of the flanges formed by grooving the ends of the knob-shanks may also be beveled. The sides of the lock B around the hole for the spindle C can be recessed to receive the ends of the shanks D. and thus allow the plates G to be readily slipped into place.

The lock B is made with a double face, the inner face-plate, H, being made of the same width as the said look, so that the plates G can he slipped into the mortise in the door along the sides of the said lock. The outer face-plate, I, is made wider than the thickness of the lock B, so as to cover the inner face,

H, and the outer ends of the slotted plates G.

The ends of the outer face-plate, I, or of both the face-plates H I, project beyond the look, as shown in Fig. 2, and are perforated to receive the screws J, that fasten the lock in place in the door.

In the outer edges of the plates G are formed L-shaped slots K to receive the end of a nail or other suitable tool for convenience in removing the said plates G when desired.

With this construction, by taking out the screws J the outer face-plate. I, can be removed and the slotted plates G withdrawn, releasing the knobs E and allowing the spindle F to be taken out and the lock B withdrawn.

With this construction, also, there are no knob-screws to work loose and drop out, or be- '85 come rusted in place, so that they cannot be taken out when it'is desired to detach the lock.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. The combination, with the lock B and the spindle F, of the knobs E, having extended shanks D, provided with ring-grooves F, and

the slotted plates G, substantially as herein outer ends of the slotted plates are covered shown and described, whereby the knobs are and the said slotted plates secured in place, as

securely fastened in place, as set forth. set forth.

2. The combination, with the slotted plates FRANCIS LATTIMER. G and the lock 13, having narrow face-plate H, Witnesses of the wider second face-plate, I, substantially EBEN H. HALL,

as herein shown and described, whereby the CHAR-LES A. MOOULLY. 

